Sewing-machine throat-plate fastening.



PATENTED AUG. 13, 1907.

No: 863,491c

W. M. AMMERMAN. SEWING MACHINE THRQATPLATB PASTENING.

APPLIUAT1DNIILED 1320.4. 1905. v

.7, UNITEDA STATES PATE WILLIAM M. AMMERMN, OF NEW HAVEN CONNECTICUT,ASSIGNOR TO THE EDvll NEW HAVEN, CONNECTICUT, A

NT OFFICE.

CORPORATION Ol` NEW JERSEY.

SEWING-MACHINE THROAT-PLATE FASTE N IN G.

Application filed December 4,

.Specification of Letters Patent.

Patented Aug. 13. 15?? 1905. Serial No. 290,059.

To all whom it may concern:

Be it known that I, WILLIAM M. AMMERMAN, a citi- The invention has forits main object to promote sewing machine bed-plate, whereby the sameneedle plate may be removed and replaced, or whereby one needle platemay be substituted for another, and may be secured preferablyr by bothprimary and secondary locking means during use ofthe sewing machine.

The invention further includes au arrangement of the primary lockingdevice relatively to a movable portion of the machine bed-plate tosupport the same; all as hereinafter described and particularly pointedout in the claims. i

Reference is made to the accompanying drawings forming part of thisspecification, and in which Figure l is a plan view of the end portionof a sewing machine bed-plate with the improved needle or throat plateapplied and locked thereto. Fig, 2 is a longitudinal vertical section,taken on line 2-2 in Fig. l. Fig. 3 is a transverse vertical section,taken on the line in Fig. l; and Fig. 4 is a bottom plan view of thedetached needle or throat plate.

A[n the drawings, the numeral l indicates the main bed-plate of a sewingmachine which has an end openingI 2, normally closed by a movableauxiliary bedplate portion which is shown hinged by pins 4, Ll, pivotedin the plate l at opposite -sides of the opening 2. lhls plate 3 mayotherwise be made movable or removable to conveniently expose to theoperator from the upper side of the bed-plate the shuttle or loopermecha nisin arranged therebelow in order to facilitate any dcsiredchange or adj ustment of parts.

lt is a usual practice to fasten the needle or throat plate of sewingmachines to the mainbed-plate by one or more screws requiring use of ascrew-driver or special auxiliary tool to remove the needle plate lastused and plate as the work being donc may suggest or require. This oldmethod of fastening a needle plate is inconvenient for most operatorsand also consumes time which otherwise ntghtfbe used with betterresults. These disadvantages are obviated by this invention whichprovides for quick and easy substitution of one needle or throat platefor another without using auxiliary hand tools, and also preferablyprovides for a double-locking of the needle plate when adjusted for useon the machine.

The improved needle or throat plate 5 tits within a rabbeted opening ofthe main bed-plate l, and has the usual general form of priorplates ofthis class, and is provided with a needle slot or passage '7, and workfeeding mechanism slots S, 8. At one lateral edge the plate 5 preferablyhas a lip or 'lug 9, shown in the prestent case ais struck ont from theupper surface of the plate, which is adapted to t snugly within alateral recess l0 made in the bed-plate l. Preferably at e.pointdirectly opposite the recess l0 there is fixed to the bed-plate land within its opening 6, a detent preferably formed as a stud or pin llhaving au enlarged head l2 providingunder it a groove 13 receiving thedirect or primary locking device of the needle plate,- which plate has ahole or passage 14 into which the stud head 12-l3 may enter freely.

The primary locking device may have various forms provided a portion ofit is adapted to `enter and leave the groove v13 of the stud 1l. Apreferred primary locking device comprises a lever 15 having its lockinghead 16 fulcrumed on a pin 17 fixed to the under side ofthe needle orthroat plate 5. The leverhcad i6 is cut away marginally and preferablyon a concavcd are 18 corresponding with the curved wall of the nccdlcplate opening 14. It is preferred to extend the lev'ct l5 late rallyoutward from its head l'in an elongated loop 19 which normally projectsbeyond the edge of the throat plate and forms a handle for convenientlyturning the lever for locking and unlocking the needle or throat plate5, aud for conveniently lifting said plate 5 from th'e bed-plate recess6. lhe laterally projecting handle loop 19 also forms a rest for theinner free edge of the closed auxiliary bed-plate portieri 3. When saidnos dlc or throat plate 5 is applied within the main hedplate opening 6and thc lever headvlt has been adj usted to lock the applied plate, apin o1sl1ouldcr20 fixed to or at the under side-ot' the lOl:-

vide a secondary positive lock preventing turning,l o the primarilylocked lever 15.

Should it be desired for any reason to remove the needle or throat plate5, the auxiliary bed-plate portion 3 will be swung over outward upon itspivots 4,

or will be bodily slid or removed if arranged lor either of theseadjustments. Such operation o the plate 3 removes its pin or shoulder 2Ofrom locking position in front 0l the handle portion 19 ol the lever 15and allows said lever to be turned upon itsfulcrum 17 until its handle19 ranges about parallel with the section line 2--2 in Fig. 1 oi thedrawings, or in a similar position indicated by thc lull lines ol' thedetail bottom plan view, Fig. 4. v This movement of the lever carriesits head 16 out oi the groove 13 o the det-ent or headed pin 11, andcauses the concaved edge portion 18 of the lever head `to register withthe adjacent wall of the ncedlo-plate hole 14, thereby releasing theprimary lock and permitting the needle or throat plate 5 to be easily 20lifted from the detent or headed pin 11--127 by the .handle 19, whilethe plate l'ip 9 slips laterally from the bed-plate recess l0. To permitreplacement of the same needle or throat plate 5 alter it has beenremoved to facilitate inspection or adjustment of the subjacent sewingmechanism, or to substitute for said removed needle plate another anddifferently formed one, it is only necessary to hold the desired needleplate by its laterally extended lever handle 19 While applying saidneedle plate within the bed- )late opening 6 as the/lip 9 ol said plate5 slips into the bed-plate recess l0, and as the opening 140i thereplaced or substituted needle plate 5 receives the bed-plate pin 11-12.This being done, the lever 15 is returned to its original lockingposition shown by dotted lines in Figs. 1 and 4 oi the drawings, andthereby the lever head 16 is again turned into the lstud or detentgroove 13 to primarily llock the replaced or substituted needle orthroat plate 5 to the bed-plate 1. The auxiliary end bed-plate portion 3will then be swung over on its pivots 4 to close pla-te opening; 2 and-will rest upon the lever handle 19 and will conceal and protect theprimary locking lever 15, `while simultaneously causing the pin orshoulder 20 on the plate 3 to effect the secondary locking o-the needleor throat plate 5 by standing in iront of the lever 15 to preventturning of it to unlocking position; This last named secondary lockingeffect would be assured it' the auxiliary movable bed-plate portionShaving the pin or shoulder 20, was 'made movable bodily or was fittedin slides or was otherwise arranged lo give access to the lower sewingmechanism or to the needle plate locking lever or device 15, as willreadily be understood. l

Various Inodilications o this invention may be made by the skilledmechanic Within the scope of any one or more of the appended claims.

i l claim as my invention:

1. In sewing machine needle or throat plate fnstcnings, the combinationwith a needle plate, oi .fr dctent on the machine bed-plate, and alocking device movably held to the needloplate and adapted to engage thesaid (intent for locking the needle-plate to the bed-plate, the saidlocking device being provided with a projecting part serving as a handleto the needle-plate for use in moving said needle plate to and from itsposition on the bed-plate.

sealer 2. ln sewing machine needle or throat plate asienings, thecombination with a needle pluto havin- T nu opening. of a deteni' on themachine beilplnie :ulnpti-d lo said noodle plate opening. :md nlocking.: device movnbly held to the needle plato und :irluptcd toengage the said deteut for locking;v the needle pluto to ihrlheil-plau-A I'. ln sewingl muchiml needle or throat pluto fzistcniugs.the combination with u needle-pluie. ol' :i leicht ou the b1. opluto, anengaging lip :ind recess :il the bed-plate und needle-plate. om :ilocking device movnbly hold to the needle-plaie and adopted to one'uo'cthc said loir-ul l'or locking the needle-pluie to thi` bed-pluto. the.snid locking' device being provided with a projecting' pui-t sorvilm'as :i handle io the needle-pluto for us(- in moving' said needleplate toand from its position ou the bod-plate,

4, In Sewing machine needle or throat plate fzistcnine's. thecombination with a needle-plate having an opening, ol a dctent on thebed-plalc adapted 1o said needle-plete opening', :in engaging lip and'recess al' the bed-pluie und needle-pluto. und u locking device movnblyheld ro the needle-plate und adopted to engage the said delent forlocking.,r tin` needle-plate to the bed-plato.

In sewing machine noodle or rhrontlplaie fasteningA the combination withn needle-plato. a detcnt on the machine bed-plate. a locking devicemovably held to the needle-plate and adnptrd to ongug'ethe said detourfor primarily locking' the needle-pluto to the bed-pluto. anu :inauxiliary movable hed-plate portion having a dctent normally securingtheneedle-plaie locking device :it locked adjustment.

G. In sewing' machine ncedh` or throat plate fastenings.

the combination with a needloplate having an opening'. :i i deteni onthil m-.ichiru` bed-plate adapted to said opening', 1l n locking.dcvicl` nxoynbly held to the needle-plate und l adapted to engage thesaid durent for primarily locking' the needloplute to the bcdplnte. and:in auxiliary movable bod-pluie having; a dctcnt normally securing theneedlel plate locking.: device ai locked adjustment.

'i' ln sowing machine needle or throat plate fastenings. the combinationwith a needle-plate having un opening'. oi' :in undercut or laterallygrooved stud lixod to .the machine bed-plate :md adapted to saidneedle-plate opening. and :i lever fulcrumed to the formed for movementout of and into register with the needle-plato openingr und adapted toengage and disenguge locking; und unlocking the needle or throat plate.

8. ln sewing machine needle or ihr-oat plate fasteninn's. combinationwith a needle-plate having' an opening'. I erooved stud fixed to the thegrooved stud for 'the and an undercut or laterally i machine bcd-plateund adapted to said needle-plate oponing. a lever full-ruined `to theneedle-plate and having' n portion formed for movement out of and intoregister with the needle-pluto opening; sind adapted to eng-ngo :inddisengunc the grooved sind for locking and unlocking the noodlr` iplate, and an engaging lip and recess at the machine beill plate andneedle-plato. l (l. ln .sowingr machine noodle or throat platetnsrenings. a needle-plate having an opening'. and un undercut orlaterally groovcd stud fixed to the machine bed-plato and adapted tosaid needle-plan` opening. n lever fnlcruined to the needleplate` andhaving- :1 portion formed for movement out of and into register with thenccdloplatc openingl and adapted to engage und disen- ,c'zig'e thegrooved stud for locking und unlocking; thil needle plate, and anauxiliary movable bed-plate portion having a pin or shoulder normallysecuring the primarily locked needle-phite lever.

10. ln sewing machine needle or throat plate fastcnings, the combinationwithl the machine bed-plate having,r a movable portion. of a needle orthroat plate adapted to said` bed-plate. a. dctent on the bed-plate, anda locking lever held to the needle-plate and adapted to engage thedetent und normally projecting' laterally beyond the Inarixin of theneedle-plate and forming a rest for the closed movable portion of thebed-plate.

1l'. Sewing machine needle or throat plate fastenings [comprising aprimary locking device securing the needlethe combination withneedle-plate und having." a portion plate to the machine bed-plate whichhas an auxiliary movable portion, and apin carried by the movablebedplate portion and normally securing the primary needleplate lockingdevice at locked adjustment. h

5 12. In sewing machine needle or throat plate fastenings thecombination with a needle plate, of a detent on the machine bedf-lplate,and a locking device movably held to the needle plate and having a partthereof adapted to engage the said detent for removably locking theneedle 10 plate to the bed-plate and having another part thereofnormally projecting laterally beyond the margin of the needle plateandserving as a handle both to the locking device and to the needle-plate,for the purpose set forth.

Signed at New Haven, in the county of New Haven and State ofConnecticut, this 25th day of November, A. D. 15

Y WILLIAM M. AMMERMAN.

Witnesses z WM. H. H. Hnwrr'r, WARD CHURCH.

